| Patents for A01B 17 - Ploughs with special additional arrangements, e.g. means for putting manure under the soil, clod-crushers (305) | |
|---|---|
| 01/1978 | |
| 01/17/1978 | US4068725 Lubricating system for plow blades |
| 11/1977 | |
| 11/15/1977 | US4058169 Automatically self-steering plow/harrow combination with release and reset mechanism connecting harrow to plow |
| 09/1977 | |
| 09/27/1977 | US4050521 Combined turnplow and subsoiler |
| 11/1976 | |
| 11/09/1976 | US3990662 Combined plow and fertilizer dispenser |
| 07/1976 | |
| 07/06/1976 | US3967564 Soil shattering and aerating device |